选择性相关法地震资料各向异性参数提取  

Extraction of seismic anisotropic parameters with selected-correlation method

作　　者：李勤[1] 李庆春[2] 李永博[3] 

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]长安大学地质工程与测绘学院,陕西西安710054 [3]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《石油物探》2014年第1期32-37,共6页Geophysical Prospecting For Petroleum

基　　金：国家自然科学基金项目(41304105;41374145);高等学校博士学科点专项科研基金项目(20120205130002);陕西省教育厅专项科研计划项目(12JK0470)共同资助

摘　　要：为了提高地震资料各向异性参数谱的精度和分辨能力,基于各向异性介质反射波时距曲线方程,针对各向异性介质中纵波各向异性参数的提取技术,引入选择性相关法,对各向异性参数谱的绘制方法进行改进,提高了各向异性参数提取的精度。理论模型测试结果证实,引入选择性相关法后得到的各向异性参数谱的分辨率明显提高,能够有效地识别出薄层信息。弱各向异性地区实际地震资料的应用试验结果表明,采用改进后的方法进行各向异性参数分析,可以减小大炮检距地震道集的动校拉伸畸变,改善复杂地区地震资料的成像质量。To improve the precision and identification capacity of anisotropic parameter spectrum extracted from seismic data,based on traveltime-distance equation of reflection wave in anisotropic media,selective correlation method is introduced.The selected-correlation method is used to improve the mapping of anisotropic parameter spectrum and the extraction precision of anisotropic parameters spectrum.Model test with synthetic data indicates that the resolution of seismic anisotropic parameters spectrum with selected-correlation method is greatly improved and thin layers can be identified.The application to seismic gathers from real data in weak anisotropic area demonstrates that stretching distortion of seismic event with large-offset data is reduced after conventional NMO correction.The quality of seismic imaging in complicated geologic area is improved.

关 键 词：各向异性 参数提取 各向异性参数谱 选择性相关法 分辨率 

分 类 号：P631.4[天文地球—地质矿产勘探]